Schematics' IE support is outdated

[jackofdiamond5]

Description

With Angular having updated their angular.json schema, the es5BrowserSupport property is no longer part of it and we should update our ng add schematic to reflect this change.

• igniteui-angular version: 11.1.x, 11.0.x, 10.2.x
• browser: n/a

Steps to reproduce

1. Create a new project with latest Angular
2. Do an ng add igniteui-angular in it
3. During installation choose to enable polyfills
4. Observe the changes in angular.json

Result

es5BrowserSupport is added to the angular.json

Expected result

es5BrowserSupport is not added to the angular.json

The inclusion for ES5 polyfills should be determined from the browsers listed in the browserslist configuration. (ref)